People once believed that all planets and stars orbited around a. mercury c. earth b. venus d. mars select the best answer from the choices provided

The necleus of an atom is made up of what subatomic particles?

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

Which best describes what forms in nuclear fission? a. two smaller, more stable nucleib. two larger, less stable nucleic. one smaller, less stable nucleusd. one larger, more stable nucleus